The Bombyx mori nucleopolyhedrovirus (BmNPV) hurts silkworm farming and causes a lot of money loss.
A protein called GP64, which helps the virus, has a special part that is important for the virus to infect cells.
This study shows that this important part of GP64 helps boost the levels of another protein called BmSpz7 in silkworms, which could help scientists find ways to stop the virus from spreading.